While dams cut off the migratory route of fish, and affect their growth and breeding, fishways are built to restore the connectivity of rivers and facilitate the life cycle of these migratory fish.
The Hubbard Glacier ice dam, which cut off porpoises from the Pacific and apparently doomed them to a fresh-water death, is on the verge of breaking open naturally, the United States Forest Service reported Saturday.
[Sunday], a large dam burst and cut off the last road to the city," LeSuer said.
The log of the dam cut-off trench (1884) shows the presence of a hitherto unreported valley bulge.
Upstream, dams and levees cut off the sediment that could help heal the erosion.
The assault on the dam — if successful — will cut off one of the key routes into the city.
But by nightfall, the rebels, who control the enormous Inga hydroelectric dam on the Congo River, cut off power again, leaving Kinshasa and nearby Brazzaville, in the neighboring Congo Republic, in the dark.
When ISIS seized the Fallujah Dam in Iraq, it cut off water to areas with Christian, Kurdish and Muslim populations.
A virus dropped at a cattle feed lot could wipe out a big part of the nation's food supply, they point out, while an attack on the dam at Lake McConaughy would cut off the main interstate linking New York and San Francisco and the biggest rail switching yard in the country.
After dams on the Volga cut off the sturgeon from most of their spawning grounds in 1960, it became the subject of the world's largest restocking program.
As the rivers were contained behind levees and dams, the floodplain was cut off from the waters that had nourished the forests, and trees could not regenerate in the drier soils.
